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 A023588 a(n) = sum of exponents in prime-power factorization of 2*prime(n)-1. 0
 1, 1, 2, 1, 2, 2, 2, 1, 3, 2, 1, 1, 4, 2, 2, 3, 3, 2, 2, 2, 2, 1, 3, 2, 1, 2, 2, 2, 2, 4, 2, 3, 3, 1, 4, 2, 1, 3, 3, 3, 3, 2, 2, 3, 2, 1, 1, 2, 2, 1, 3, 3, 2, 2, 4, 4, 2, 1, 2, 3, 2, 4, 1, 4, 4, 2, 1, 1, 4, 2, 3, 2, 1, 2, 1, 4, 3, 2, 3, 2, 4, 2, 3, 2, 1, 3, 3, 2, 2, 3, 2, 3, 2, 3, 1, 3, 3, 2, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS FORMULA a(n) = A001222(A076274(n)). - R. J. Mathar, Mar 10 2011 MATHEMATICA Array[Plus@@Last/@FactorInteger[2*Prime[ # ]-1]&, 6! ] (* Vladimir Joseph Stephan Orlovsky, Feb 28 2010 *) CROSSREFS Sequence in context: A067148 A035228 A035164 * A175242 A225843 A301957 Adjacent sequences:  A023585 A023586 A023587 * A023589 A023590 A023591 KEYWORD nonn AUTHOR STATUS approved

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Last modified October 15 13:01 EDT 2018. Contains 316236 sequences. (Running on oeis4.)